"The race is still holding its own from the years we had Armstrong when we sort of went through the roof with the numbers," he said.

Next year's tour will be the first to end on Australia Day since 2003.

Tourism minister Leon Bignell says there are several other events scheduled in the city at the same time and wants to make sure they complement rather than hinder one another.

"We are going to have an international cycling race, we're going to have international cricket on Adelaide Oval, the revamped Adelaide Oval, and we're going to have the Australian Day Parade," he said.

"We are already in discussions the three groups so that we don't clash."